【正文】 ivided by the BOD。t like to control very much in operate process its at two sink the pond stop over time, resulting in the anoxia easily, producing the corrupt and dirty mire ascend to float。 ms, even larger}, but the bottom current velocity is very small( especially at the water is deep 2/3 or 3/4 below, mix with the liquid has no current velocity almost), causing ditch bottom large quantity accumulate the mire( sometimes accumulate the mire thickness amount to a ms), the valid capacity that reduced to oxidize the ditch consumedly, lowered to handle result, affected a water fluid matter[13]. Moreover, pass in the spirit on board swim to establish the underwater push machine can also turn to the spirit of the liquid of admixture that brush the bottom low speed area circulates to flow to rise positive push function, from but the solution oxidizes the problem that low and dirty mire in current velocity in bottom in ditch sink accumulates,Establish the underwater push machine useds for exclusivelythe push mixs withtheliquidcan make movementmethod that oxidize the ditch much more vivid, this for economy energy, lift the highefficiency having the very important meaning [14]. 5. The Carrousel oxidizes the development of the ditch Because the dirty water handles standard inside to divided by the phosphorus take off the nitrogenous request more and more strict, the development that Carrousel further oxidized the ditch to also , the research and application includes morely below two category type:Tiny bore spirit type Carrousel 2020 systems, Carrousel 3000 system. TIny bore spirit type Carrousel 2020 system Tiny bore spirit type Carrousel 2020 tiny bore in adoption in system spirit( provide oxygen equipments as the drum breeze machine), the tiny bore spirit machine can produce the diameter of large quantity as a surface for or so and small spirit steeping, this consumedly increases spirit bubble accumulates, undering the certain circumstance in capacity in pond make the oxygen transfer the gross measures aggrandizement.( if deep increment in pond, its spread the quality efficiency will be higher)Produce the technique ability of the factory house according to the current drum breeze machine, the valid waterof thepond is deepbiggestamountingtoa8 ms, therefore can select by examinations according to the different craft request the fit water is tradition oxidizes the ditch pushes to flow is to make use of to turn to brush, turn a disc or pour the umbrella type form machine realizes of, its equipments utilization is low, the motive consumes bore spirit type Carrousel 2020 systems then adopted the underwater pushes the way that flow, rises to dive the propeller the leaf the motivation that round creation the direct function namely in the of water, at push to flow the function to can keep dirty mire from sinking to decline effectively again at the same s a result, the adoption dives the propeller since lower the motive consume, making mire water got again to mixs with adequately. Carrousel 3000 system Carrousel 3000 systems are in the Carrousel 2020 systems are exto plus a living creature the choice the living creature choice area is a craft to make use of high anism carries to sieve germ grow, repress silk form germ increase, increase each pollutant do away with the rate, afterward principle together Carrousel 2020 syste m. Carrousel 3000 system of bigger increases to express at:An is to increased the pond deep, can amount to 39。 van Groenestijn, J. W. Use of contact tank to enhance denitrification in oxidation ditches. Water Science and Technology, 1996, 34(12):195~~1117. [3] 汪大，雷樂成。給水排水， 1999， 25(8)： 13~18。廣西土木建筑， 1998， 23 (4)： 183~187。改善氧化溝流速分布的措施 中國給水排水， 20 01， 17(2)： 16~18。氧化溝脫氮除磷工藝的運行控制 。 H 233。 冶金礦山設(shè)計與建設(shè)， 2020， 32(6